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Hinge Structure One bone has an outwardly curved surface and the other bone has an inwardly curved surface

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Hinge Movement Produced Two opposite directions such as back and forth Up and down nearly 90 0 Allow parts to bend and straighten

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Hinge Examples Elbow Knee

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Gliding Structure The surfaces of the bones that touch are flat

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Gliding Movement Produced Bones move back and forth or side to side

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Gliding Examples Wrist Ankles

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Pivot Structure Rounded end of one bone passes through a hole in another

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Pivot Movement Produced Allows twisting

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Pivot Examples Head on neck

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What are Ligaments? Fibrous bands of connective tissue linking two or more bones, cartilages, or structures together, to form a joint.

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5 functions of a skeleton Support –the body is kept in position by the muscles that attach to the skeleton. Protection –the flat bones protect the internal organs. Movement –provided by the joints

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5 Functions of a Skeleton Production of Blood –blood cells are produced in the red bone marrow in the center of some bones, including the pelvis, ribs, vertebrae and sternum. The yellow bone marrow stores fat. Storage –Minerals are stored in the bone, mostly calcium and phosphorus